Explosive part with selectable initiation

Abstract

The invention is characterized in that the a explosive part ( 1 ) comprises two initiation devices ( 7 ) arranged on each end face ( 5 ) with connections to an inner explosive charge ( 2 ), the two initiation devices ( 7 ) being arranged for optional initiation of the inner explosive charge ( 2 ), with or without an ignition delay. At, and in that the diameter di of the inner explosive charge ( 2 ), the thicknesses ti, ty of the two insulating layers ( 8, 9 ) and thickness is of air gap ( 10 ) are chosen such that energy from two colliding detonation fronts along the common centre axis A-A is required in order for the initiation to lead to detonation of the outer explosive charge ( 3 ). The invention also relates to a method for the above.

1 . An explosive part ( 1 ), intended to form part of an explosive device for combating different targets and combat situations, which explosive part comprises at least two tubular explosive charges comprising an explosive: an inner explosive charge with diameter d i  and an outer explosive charge with diameter d y , which two explosive charges are arranged coaxially along a common centre axis A-A between two end faces, the explosive charges being separated from each other with at least two insulating layers: an outer insulating layer with layer thickness t y  arranged on the outer explosive charge, an inner insulating layer with layer thickness t i  arranged on the inner explosive charge, and an air gap with thickness t s  between the two insulating layers, wherein the explosive part also comprises two initiation devices arranged on each end face with connections to the inner explosive charge, which two initiation devices are arranged for optional initiation of the inner explosive charge, with or without an ignition delay Δt, the diameter d 1  for the inner explosive charge, materials and layer thicknesses t i , t y  for the two insulating layers and the thickness t s  for the air gap being chosen such that two colliding detonation fronts at a position Z along the common centre axis A-A are required in order for the initiation to lead to detonation of the outer explosive charge. 
     
     
         2 . An explosive part according to  claim 1 , wherein the diameter d 1  for the inner explosive charge lies within the range 15-25 mm, the thickness t y  for the outer insulating layer lies within the range 2-4 mm, the thickness t i  for the inner insulating layer lies within the range 2-4 mm, and the thickness t s  for the air gap lies within the range 5-9 mm. 
     
     
         3 . An explosive part according to  claim 1 , wherein the material in the outer insulating layer is constituted by copper, and in that the material in the inner insulating layer is constituted by plastic. 
     
     
         4 . An explosive part according to  claim 1 , the diameter d y  for the outer explosive charge is 120 mm. 
     
     
         5 . An explosive part according to  claim 1 , wherein the position Z along the centre axis A-A for the two colliding detonation fronts are selectable through the choice of a time delay Δt, and in that the choice of the position Z allows the choice of at least one action function for the explosive charge. 
     
     
         6 . An explosive part according to  claim 1 , the explosive part comprises an explosive casing comprising a plurality of fragment-forming elements of different sizes, the fragment-forming elements being arranged with decreasing size between the two end faces for the attainment of a plurality of action functions in dependence on the choice of a position Z along the centre axis A-A. 
     
     
         7 . An explosive device for combating different targets, comprising at least three explosive parts having different action functions according to  claim 1 , which explosive parts are arranged one after the other along a common centre axis A-A between two end faces, the explosive parts being separated from each other with intervening detonation barriers for preventing flashover ignition between the explosive parts, wherein the inner explosive charges of the explosive parts have been replaced with a common inner explosive charge, which common inner explosive charge is arranged axially through the explosive parts via the intervening detonation barriers, so that at least one explosive part is optionally detonable through the choice of initiation position Z along the common centre axis A-A, corresponding to the position for any one of the explosive parts. 
     
     
         8 . An explosive device according to  claim 7 , wherein the explosive parts comprise fragment-forming elements of different size and quantity for the attainment of a plurality of action functions. 
     
     
         9 . An explosive device according to  claim 7 , wherein the outer explosive charge, in at least one of the explosive parts, is configured for directed explosive effect to achieve detonation of at least one of the adjoining explosive parts through penetration of at least one of the intervening detonation harriers. 
     
     
         10 . An explosive device according to  claim 9 , wherein the directed explosive effect is configured by virtue of the fact that outer explosive charge comprises a conical end face part and that the conical end face part comprises at least one metal inlay for enhanced effect. 
     
     
         11 . An explosive device according to  claim 7  for the attainment of at least three different action directions X, Y, Z, wherein fragment-forming elements are arranged in defined regions of the explosive casing of the explosive parts, the defined regions being arranged with different mutual action directions X, Y, V, the perpendicular to the defined regions corresponding to the action directions X, Y, V of the explosive parts. 
     
     
         12 . An explosive device according to  claim 11 , the defined regions have the form of flat square or rectangular areas with length L and width B, the length L being less than or equal to the length L of the explosive parts and B being less than or equal to 75% of the diameter D of the explosive parts. 
     
     
         13 . An ammunition unit for combating different types of targets, wherein the ammunition unit comprises an explosive device according to  claim 1 . 
     
     
         14 . A method comprising at least two tubular explosive charges, comprising an explosive, an inner explosive charge with diameter d i  and an outer explosive charge with diameter d y , which two explosive charges are arranged coaxially along a common centre axis A-A between two end faces, the explosive charges being separated with at least two insulating layers: an outer insulating layer with layer thickness t y , which is arranged on the outer explosive charge, and an inner insulating layer with layer thickness t i , which insulating layer is arranged on the inner explosive charge, as well as an air gap with thickness t s  between the two insulating layers, two initiation devices are also provided, one on each end face ( 5 ) of the explosive part ( 1 ), the two initiation devices being arranged for optional initiation of the inner explosive charge, with or without an ignition delay Δt, and in that the diameter d 1  for the inner explosive charge, materials and layer thicknesses t i , t y  for the two insulating layers, and the thickness t s  for the air gap, are chosen such that two colliding detonation fronts at a position Z along the common centre axis A-A are required in order for the initiation to lead to detonation of the outer explosive charge. 
     
     
         15 . A method according to  claim 14 , wherein the diameter d 1  for the inner explosive charge is chosen within the range 15-25 mm, in that the thickness t y  for the outer insulating layer is chosen within the range 2-4 mm, in that the thickness t i  for the inner insulating layer is chosen within the range 2-4 mm, and in that the thickness t s  for the air gap is chosen within the range 5-9 mm. 
     
     
         16 . An explosive device for combating different targets, comprising at least three explosive parts having different action functions according to  claim 2 , which explosive parts are arranged one after the other along a common centre axis A-A between two end faces, the explosive parts being separated from each other with intervening detonation barriers for preventing flashover ignition between the explosive parts, wherein the inner explosive charges of the explosive parts have been replaced with a common inner explosive charge, which common inner explosive charge is arranged axially through the explosive parts via the intervening detonation barriers, so that at least one explosive part is optionally detonable through the choice of initiation position Z along the common centre axis A-A, corresponding to the position for any one of the explosive parts. 
     
     
         17 . An explosive device for combating different targets, comprising at least three explosive parts having different action functions according to  claim 3 , which explosive parts are arranged one after the other along a common centre axis A-A between two end faces, the explosive parts being separated from each other with intervening detonation barriers for preventing flashover ignition between the explosive parts, wherein the inner explosive charges of the explosive parts have been replaced with a common inner explosive charge, which common inner explosive charge is arranged axially through the explosive parts via the intervening detonation barriers, so that at least one explosive part is optionally detonable through the choice of initiation position Z along the common centre axis A-A, corresponding to the position for any one of the explosive parts. 
     
     
         18 . An explosive device for combating different targets, comprising at least three explosive parts having different action functions according to  claim 4 , which explosive parts are arranged one after the other along a common centre axis A-A between two end faces, the explosive parts being separated from each other with intervening detonation barriers for preventing flashover ignition between the explosive parts, wherein the inner explosive charges of the explosive parts have been replaced with a common inner explosive charge, which common inner explosive charge is arranged axially through the explosive parts via the intervening detonation barriers, so that at least one explosive part is optionally detonable through the choice of initiation position Z along the common centre axis A-A, corresponding to the position for any one of the explosive parts. 
     
     
         19 . An explosive device for combating different targets, comprising at least three explosive parts having different action functions according to  claim 5 , which explosive parts are arranged one after the other along a common centre axis A-A between two end faces, the explosive parts being separated from each other with intervening detonation barriers for preventing flashover ignition between the explosive parts, wherein the inner explosive charges of the explosive parts have been replaced with a common inner explosive charge, which common inner explosive charge is arranged axially through the explosive parts via the intervening detonation barriers, so that at least one explosive part is optionally detonable through the choice of initiation position Z along the common centre axis A-A, corresponding to the position for any one of the explosive parts. 
     
     
         20 . An explosive device for combating different targets, comprising at least three explosive parts having different action functions according to  claim 6 , which explosive parts are arranged one after the other along a common centre axis A-A between two end faces, the explosive parts being separated from each other with intervening detonation barriers for preventing flashover ignition between the explosive parts, wherein the inner explosive charges of the explosive parts have been replaced with a common inner explosive charge, which common inner explosive charge is arranged axially through the explosive parts via the intervening detonation barriers, so that at least one explosive part is optionally detonable through the choice of initiation position Z along the common centre axis A-A, corresponding to the position for any one of the explosive parts.